Machine for rolling corrugated headers for tubular boilers.



No. 674,555. Patented May 2|, I90l.

' C. HARTEB.

MACHINE FOR BOLLINGGOBRUGATED HEADERS FOB TUBULAR BOILERS.

(Application filed Mar. 25, 1901.) (No Model.) 2 SheetsSheet I.

Fig.1.

No. 674,555. Patented May 2|, l90l.' C. HABTEB.

MACHINE FOB ROLLING CORRUGATED HEADERS FOR TUBULAR BOILERS.

(Application filed Mar. 25, 1901.)

2 Sheets$heet 2.

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UNITED STATES PATENT OFFICE.

CHARLES HARTER, OF BARBERTON, OHIOJ MACHINE FOR ROLLING CORRUGATED HEADERS FOR TUBULAR BOILERS.

SPECIFICATION forming part of Letters Patent No. 674,555, dated May 21, 1901.

Application filed March 25, 1901- berial No. 52,796, (N d l.)

To all whom it may concern:

Be it known thatI, CHARLES HARTER, a citizen of the United States, residing at Barberton, in the county of Summit and State of Ohio, have invented a certain new and useful Improvement in Machines for Rolling Corrugated Headers for Tubular Boilers, of which the following is a specification.

My invention has relation to improvements in devices for corrugating the headers of that class of steam and heating boilers which 'consist of oppositely-disposed vertical hollow cases termed headers, united by parallel tubes. In many instances these headers are straight rectangular tubes; but a preferred form ofconstruction is to corrugate them in sinuous lines, the opposite walls being similarly shaped, thus permitting the tubes to be inserted alternately in the projecting sinuosities to enable them to stand alternatelyin vertical planes.

The object of my improvement is to provide devices by which the headers, originally constructed in straight rectangular tubes, may be corrugated in sinuous form when heated.

To the accomplishment of the aforesaid purpose my invention consists in the peculiar and novel construction, arrangement, and combination of parts hereinafter described and then specifically pointed outin theclaims, reference being had to the accompanying drawings, which form a part of this specification.

In the accompanying drawings, in which similar reference-numerals indicate like parts in the diiferent views, Figure l is a plan of my improved device for corrugating the tubes; Fig. 2, a section at the line X X of Fig. 1; and Fig. 3, an end view of a boiler, illustrating the form of header which m y device is designed to make.

Referring to the figures, l is a housing in which are revolubly mounted upper and lower oppositel'y-disposed.rolls 2 3, having corrugated peripheries so adjusted that the ridges of one will in their revolution be opposite the intermediate channels of the other. These rolls are arranged to be brought into proper relation to each other by screws 4, meshing in screw-threaded openings in the housings 1.

- Opposite to the medial line between the rolls 2 3 is situatedahydraulic cylinder 5, in which is a piston 6, which has a piston-rod 7, that extends movably through a stuffing-box 8. This cylinder 5 bears on opposite sides trunnions 9 10, mounted in boxes 11 12 on a circular head 13 on a vertical shaft 14, revolubly mounted in a housing 15, the lower end of said shaft resting in a step 16. Ports 17 18 are provided in said cylinder for the entrance and exhaust of the fluid under pressure to actuate the piston 6; but as this is a common form of a hydraulic cylinder the pipes for connecting either with a source of fluid-supply are omitted.

Above and below the line of entrance to the rolls are arranged guide-rolls 19 20, supported in suitable hearings in the housings 1. The housings 15 and 1 are set or separated at such a distance apart that a tube of any determined length may be interposed between them, this fact being suggested by the broken lines which mark their limits in the figures. Attached to the projecting end of the pistonrod 7 is a mandrel 21, having a head 22, with a plain upper, lower, and back face of the width of the header to be corrugated and a narrow front edge for facility of entering the header and provided at its greatest vertical thickness with upper and lower friction-rollers 23 24. The verticaldistance between the outer peripheries of the rollers 23 24 is such as will fill the space between the upper and lower internal faces of the header when between the rolls 2 3.

In operation a lap-welded square tube 25, to constitute the header, is heated to such a degree as to render it malleable in a furnace (not shown) at one side of the circular head 13. The head 13 is then revolved on its shaft 14 enough to bring the head of the mandrel in alinement with the end of the heated tube, the piston 6 being during this portion of the operation drawn back to the left end of the cylinder. The mandrel 21 is then forced into the heated tube until its front projects from the farther end thereof, thus supporting the tube thereon. Tth e l@d 13 is then revolved until the mandrel-head 22 is in position to pass between the guiderolls 19 20. The rolls 2 3 being in motion, the piston 6 is then forced forward until the end of the tube 25 and the mandrel-head 22 rest ICO 1. Amachine for corrugating headers for tubular boilers consisting of oppositely-disposed rolls having corrugations on the faces thereof parallel with the axis of the rolls, arranged to revolve adjacent to each other with the grooves of said rolls alternating, and av mandrel having a head to support the innerfaces of the header between the rolls during the process, substantially as shown and described.

2. A machine for corrugating headers for tubular boilers consisting of like oppositelydisposed rolls having corrugations on the faces thereof parallel with the axis of the rolls, arranged to revolve adjacent to each other with the grooves of said rolls alternating, and a mandrel having a head with frictional rollers to support the inner faces of the header betweenthe rolls during the process,

substantially as shown and described.

3. In a machine for corrugating headers for tubular boilers, the combination with oppositely-disposed rolls having corrugations on the faces thereof parallel with the axis of the rolls, arranged to revolve adjacent to each other with the grooves of said rolls alternating, of a hydraulic cylinder having a piston carrying a mandrel having a head to support the inner faces of the header between the rolls, and arranged to carry said mandrelhead between the rolls and withdrawit therefrom, substantially as shown and described.

4. In a-machine for corrugating headers for tubular boilers, the combination with oppositely-disposed rolls having corrugations on the faces thereof parallel with the axis of said rolls, arranged to revolve adjacent to each other with the grooves of said rolls alternating, of a hydraulic cylinder mounted on a support to revolve horizontally having a piston carrying a mandrel bearing a head to support the inner faces of the header between the rolls, and arranged to bring said mandrel-head in alinement with said rolls and carryit between them and Withdraw it therefrom, substantially as shown and described.

In testimony that I claim the aboveI hereunto set my hand in the presence of two subscribing Witnesses.

CHARLES HARTER. In presence of O. P. HUMPHREY, O. E. HUMPHREY. 

